US992946A - Wood-tap. - Google Patents

Wood-tap. Download PDF

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Publication number
US992946A
US992946A US54636310A US1910546363A US992946A US 992946 A US992946 A US 992946A US 54636310 A US54636310 A US 54636310A US 1910546363 A US1910546363 A US 1910546363A US 992946 A US992946 A US 992946A
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US
United States
Prior art keywords
sections
tap
wood
screw
shank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US54636310A
Inventor
Daniel W Edwards
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Greenlee Brothers and Co
Original Assignee
Greenlee Brothers and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Greenlee Brothers and Co filed Critical Greenlee Brothers and Co
Priority to US54636310A priority Critical patent/US992946A/en
Application granted granted Critical
Publication of US992946A publication Critical patent/US992946A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G5/00—Thread-cutting tools; Die-heads
    • B23G5/02—Thread-cutting tools; Die-heads without means for adjustment
    • B23G5/06—Taps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/904—Tool or Tool with support with pitch-stabilizing ridge
    • Y10T408/9046—Tool or Tool with support with pitch-stabilizing ridge including tapered section

Definitions

  • the object of this invention is to construct a tap for forming screw-threads in wood material.
  • Figure 1 is a side elevation of a tap containing my improvements.
  • Fig. 2 is a section on dotted line a a Fig. 1.
  • Fig. 3 is an end view.
  • the tap has the general characteristics of an ordinary tap and comprises a shank 1 having three sections 2, 3 and 4.- of screwthreads.
  • Fig. 2 is a section on dotted line a a Fig. 1, in which the three sections of threads are clearly shown.
  • the section 2 of the screw-thread next below the dotted line a a has a cutting edge 5, while the sections 3 and 4 are each formed with a cutawayportion 6.
  • Each thread between the dotted line a a Fig. 1, and the point of the tap has one section formed with a cutting edge, and the other two sections are formed a with the cut-away portions 6, while all the screw-sections between the dotted line a a Fig. 1 and the shank end 1 of the tap are formed with cutting edges.
  • the object in forming the screw-sections with the cut-away portions is .to remove the cutting action from such sections, thereby forming simply followers of them so that they will follow the cut made by the single screw-section of the series of sections of a thread. If each section was a cutter, the tap would not lead in but would tear away the entire wood.
  • a tap for forming threads in wood comprising a shank having a screw-thread divided into a plurality of sections by grooves extending in the lengthwise direction of the shank, certain of the sections be ing formed with both upper and lower cutting edges, and other sections having certain of said edges removed.
  • a tap for forming threads in wood comprising a shank having a screw thread of progressively increasing radial thickness divided into a plurality of sections by grooves extending in a lengthwise direction of the shank, certain of the sections being formed with both upper and'lower cutting edges, and other sections havin their front upper cutting edges beveled oft at an angle to the upper face of the threads and also to the front faces of the sections.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)

Description

D. W. EDWARDS.
WOOD TAP.
APPLIOATION'IILBD P3128, 1910.1
Patented May 23, 1911.
fzz ezziazz' warns UNITED STATES PATENT OFFICE.
DANIEL W. EDWARDS, OF ROCKFORD, ILLINOIS, ASSIGNOR TO GREENLEE BROS. & COM- PANY, A CORPORATION OF ILLINOIS.
W0 OD-TAIP.
Specification of Letters Patent.
Patented May 23, 1911.
To all whom 'it may concern:
Be it known that I, DANIEL W. EDWARDS, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Wood-Taps, of which the following is a specification.
The object of this invention is to construct a tap for forming screw-threads in wood material.
In the accompanying drawings, Figure 1 is a side elevation of a tap containing my improvements. Fig. 2 is a section on dotted line a a Fig. 1. Fig. 3 is an end view.
The tap has the general characteristics of an ordinary tap and comprises a shank 1 having three sections 2, 3 and 4.- of screwthreads. Fig. 2 is a section on dotted line a a Fig. 1, in which the three sections of threads are clearly shown. The section 2 of the screw-thread next below the dotted line a a has a cutting edge 5, while the sections 3 and 4 are each formed with a cutawayportion 6. Each thread between the dotted line a a Fig. 1, and the point of the tap has one section formed with a cutting edge, and the other two sections are formed a with the cut-away portions 6, while all the screw-sections between the dotted line a a Fig. 1 and the shank end 1 of the tap are formed with cutting edges.
The object in forming the screw-sections with the cut-away portions is .to remove the cutting action from such sections, thereby forming simply followers of them so that they will follow the cut made by the single screw-section of the series of sections of a thread. If each section was a cutter, the tap would not lead in but would tear away the entire wood.
I claim as my invention.
1. A tap for forming threads in wood, comprising a shank having a screw-thread divided into a plurality of sections by grooves extending in the lengthwise direction of the shank, certain of the sections be ing formed with both upper and lower cutting edges, and other sections having certain of said edges removed.
2. A tap for forming threads in wood, comprising a shank having a screw thread of progressively increasing radial thickness divided into a plurality of sections by grooves extending in a lengthwise direction of the shank, certain of the sections being formed with both upper and'lower cutting edges, and other sections havin their front upper cutting edges beveled oft at an angle to the upper face of the threads and also to the front faces of the sections.
In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.
DANIEL W. EDWARD S.
Witnesses:
A. O. BEHEL, E. D. E. N. BEHEL.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.
US54636310A 1910-02-28 1910-02-28 Wood-tap. Expired - Lifetime US992946A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US54636310A US992946A (en) 1910-02-28 1910-02-28 Wood-tap.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US54636310A US992946A (en) 1910-02-28 1910-02-28 Wood-tap.

Publications (1)

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US992946A true US992946A (en) 1911-05-23

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US54636310A Expired - Lifetime US992946A (en) 1910-02-28 1910-02-28 Wood-tap.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6217267B1 (en) * 1997-07-16 2001-04-17 Osg Corporation Cold forming tap having internal finish cutting edge and method of producing the same
US20090074526A1 (en) * 2007-09-18 2009-03-19 Yg-1 Co., Ltd. Compound Relief Tap

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6217267B1 (en) * 1997-07-16 2001-04-17 Osg Corporation Cold forming tap having internal finish cutting edge and method of producing the same
US20090074526A1 (en) * 2007-09-18 2009-03-19 Yg-1 Co., Ltd. Compound Relief Tap

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